ABAP Select data from SAP table P3421 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP P3421 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to P3421. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the P3421 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_P3421 TYPE STANDARD TABLE OF P3421,
      WA_P3421 TYPE P3421,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <P3421> TYPE P3421.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P3421.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P3421
  INTO TABLE IT_P3421.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P3421
*  INTO TABLE @DATA(IT_P34212).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_P3421 INDEX 1 INTO DATA(WA_P34212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P3421 ASSIGNING <P3421>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P3421>-PERNR = 1.
<P3421>-INFTY = 1.
<P3421>-SUBTY = 1.
<P3421>-OBJPS = 1.
<P3421>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P3421 INTO WA_P3421.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P3421-ENDDA, sy-vline,
  WA_P3421-BEGDA, sy-vline,
  WA_P3421-SEQNR, sy-vline,
  WA_P3421-AEDTM, sy-vline,
  WA_P3421-UNAME, sy-vline,
  WA_P3421-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P3421 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_P3421 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_P3421 INTO WA_P3421.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field DOCSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P3421-DOCSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P3421-DOCSY.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P3421_STR, 
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
ZLA_ID1 TYPE STRING,
ZLA_ID2 TYPE STRING,
PESEL TYPE STRING,
FIRST_NAME TYPE STRING,
LAST_NAME TYPE STRING,
INSURANCE_ORG TYPE STRING,
PASSPORT TYPE STRING,
BIRTH_DATE TYPE STRING,
ZIP_CODE TYPE STRING,
CITY TYPE STRING,
STREET TYPE STRING,
HOUSE TYPE STRING,
FLAT TYPE STRING,
BEGDH TYPE STRING,
ENDDH TYPE STRING,
INSTRUCTION TYPE STRING,
CODE TYPE STRING,
ILLNESS_CODE TYPE STRING,
FAMILY_TYPE TYPE STRING,
BIRTH_DATE2 TYPE STRING,
ID_TYPE2 TYPE STRING,
ID2 TYPE STRING,
NAME2 TYPE STRING,
ZIP_CODE2 TYPE STRING,
CITY2 TYPE STRING,
STREET2 TYPE STRING,
HOUSE2 TYPE STRING,
FLAT2 TYPE STRING,
DOCTOR_ID TYPE STRING,
DOCTOR_FNAME TYPE STRING,
DOCTOR_INAME TYPE STRING,
ZLA_DATE TYPE STRING,
DLDATE TYPE STRING,
DLTIME TYPE STRING,
LOCKTR TYPE STRING,
STATUS TYPE STRING,
DOCSY TYPE STRING,
DOCNR TYPE STRING,
ZUSSTAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P3421_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_P3421_STR-PERNR sy-vline 
WA_P3421_STR-INFTY sy-vline 
WA_P3421_STR-SUBTY sy-vline 
WA_P3421_STR-OBJPS sy-vline 
WA_P3421_STR-SPRPS sy-vline 
WA_P3421_STR-ENDDA sy-vline 
WA_P3421_STR-BEGDA sy-vline 
WA_P3421_STR-SEQNR sy-vline 
WA_P3421_STR-AEDTM sy-vline 
WA_P3421_STR-UNAME sy-vline 
WA_P3421_STR-HISTO sy-vline 
WA_P3421_STR-ITXEX sy-vline 
WA_P3421_STR-REFEX sy-vline 
WA_P3421_STR-ORDEX sy-vline 
WA_P3421_STR-ITBLD sy-vline 
WA_P3421_STR-PREAS sy-vline 
WA_P3421_STR-FLAG1 sy-vline 
WA_P3421_STR-FLAG2 sy-vline 
WA_P3421_STR-FLAG3 sy-vline 
WA_P3421_STR-FLAG4 sy-vline 
WA_P3421_STR-RESE1 sy-vline 
WA_P3421_STR-RESE2 sy-vline 
WA_P3421_STR-GRPVL sy-vline 
WA_P3421_STR-ZLA_ID1 sy-vline 
WA_P3421_STR-ZLA_ID2 sy-vline 
WA_P3421_STR-PESEL sy-vline 
WA_P3421_STR-FIRST_NAME sy-vline 
WA_P3421_STR-LAST_NAME sy-vline 
WA_P3421_STR-INSURANCE_ORG sy-vline 
WA_P3421_STR-PASSPORT sy-vline 
WA_P3421_STR-BIRTH_DATE sy-vline 
WA_P3421_STR-ZIP_CODE sy-vline 
WA_P3421_STR-CITY sy-vline 
WA_P3421_STR-STREET sy-vline 
WA_P3421_STR-HOUSE sy-vline 
WA_P3421_STR-FLAT sy-vline 
WA_P3421_STR-BEGDH sy-vline 
WA_P3421_STR-ENDDH sy-vline 
WA_P3421_STR-INSTRUCTION sy-vline 
WA_P3421_STR-CODE sy-vline 
WA_P3421_STR-ILLNESS_CODE sy-vline 
WA_P3421_STR-FAMILY_TYPE sy-vline 
WA_P3421_STR-BIRTH_DATE2 sy-vline 
WA_P3421_STR-ID_TYPE2 sy-vline 
WA_P3421_STR-ID2 sy-vline 
WA_P3421_STR-NAME2 sy-vline 
WA_P3421_STR-ZIP_CODE2 sy-vline 
WA_P3421_STR-CITY2 sy-vline 
WA_P3421_STR-STREET2 sy-vline 
WA_P3421_STR-HOUSE2 sy-vline 
WA_P3421_STR-FLAT2 sy-vline 
WA_P3421_STR-DOCTOR_ID sy-vline 
WA_P3421_STR-DOCTOR_FNAME sy-vline 
WA_P3421_STR-DOCTOR_INAME sy-vline 
WA_P3421_STR-ZLA_DATE sy-vline 
WA_P3421_STR-DLDATE sy-vline 
WA_P3421_STR-DLTIME sy-vline 
WA_P3421_STR-LOCKTR sy-vline 
WA_P3421_STR-STATUS sy-vline 
WA_P3421_STR-DOCSY sy-vline 
WA_P3421_STR-DOCNR sy-vline 
WA_P3421_STR-ZUSSTAT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.